implement redirect after login

views/login/google_signup.php

@@ -5,7 +5,7 @@
 @section(main)
     <h2>Sign up</h2>
     <div class="box">
-        <form id="googleSignupForm" action="/signup/google" method="post" data-redirect-on-success="/">
+        <form id="googleSignupForm" action="/signup/google" method="post" data-redirect-on-success="<?= $redirectUrl ?>">
             <?php if ($found): ?>
                 <p class="justify">Please confirm that you link your account to your Google account.</p>
             <?php else: ?>